Electrical – Why is barrier potential of Ideal Diode zero


I am learning the basics of semiconductors.
Going through diode equivalent circuits, the material says that Ideal Diodes have a barrier potential of 0 volts. Why is this?

I have understood what a pn junction diode is and how it works, but I cant wrap my head around this.

Best Answer

An Ideal Diode isn't a semiconductor. It isn't a vacuum tube either.

It's the theoretical idea of what a perfect diode would look like if you ever managed to find one. It would be a perfect conductor to currents flowing one way, but a perfect insulator to currents trying to flow the other way.

Such a thing doesn't actually exist, just like you can't find an Ideal Capacitor or Ideal Inductor anywhere.